Calumet Telescopic Remote Boom Studio shooters will appreciate the ease of light-angle control offered by this heavy-duty, telescopic boom. Location shooters will enjoy its portability. The length of the boom extends from 58" to 8 1/2' and a remote crank at the back of the arm controls the direction of the light source mounted at the other end up to 135. It comes with a 5/8" stud and a 15 lb. counterweight.